IMHO: Both are GTG & Top Notch, Cant go wrong with either. Have a couple LMT Tac. Latch & BCM GF Mod 4, but between the two I prefer/like the latch & design of the BCM Gunfighter Mod 4 :D.
fwiw: Never had any issues with the LMT Tact. Latch with and without gloves.
???: Would I change out an existing functioning AR rifle that has a LMT Tac. Latch Charging Handle? . . . .Always an option, but I see no reason to, its a great product & gets it done.
BUT, for a new build I’d spend a few bucks more & get the BCM GF Mod ___. With that said I will only buy the BCM Gunfighter Mod Series of CH from here on out.
Also, Never hurts to have a couple LMT Tact. CH spares
The LMT is a good CH but still does not fix the problem of the roll pin taking all of the stress of cycling with one hand manipulations where the BCM fixes this.
The LMT was the best option until BCM took the CH and redesigned it which fixed the fatal flaw of the original CH which was roll pin stress.
I would spend the extra money for peace of mind. I replaced the one LMT CH I had with a BCM. YMMV
You can’t go wrong either way. If your tight on money get the LMT if not get the BCM Mod 4. The big thing about LMT was that it was cheap then they jacked the price awhile back when things were hard to get…Then BCM took the spotlight with their Charging handles…I own both, LMT and BCM Mod 3 and Mod 4. I definitely like the Mod 4.